package com.lagou.server;

import com.lagou.decode.RpcDecoder;
import com.lagou.handler.UserServiceHandler;
import com.lagou.request.RpcRequest;
import com.lagou.serializer.JSONSerializer;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringEncoder;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;

@Component
public class RpcServer implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) throws Exception {
        this.startServer("127.0.0.1", 8999);
    }

    // 创建一个方法启动服务器
    public void startServer(String ip, int port) throws InterruptedException {
        // 1.创建两个线程池对象
        NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        NioEventLoopGroup workGroup = new NioEventLoopGroup();

        // 2.创建服务端的启动引导对象
        ServerBootstrap serverBootstrap = new ServerBootstrap();

        // 3.配置启动引导对象
        serverBootstrap.group(bossGroup, workGroup)
                // 设置通道为NIO
                .channel(NioServerSocketChannel.class)
                // .childHandler(new ProtobufChannelHandler())
                // 创建监听channel
                .childHandler(new ChannelInitializer<NioSocketChannel>() {
                    @Override
                    protected void initChannel(NioSocketChannel nioSocketChannel) throws Exception {
                        // 获取管道对象
                        ChannelPipeline pipeline = nioSocketChannel.pipeline();
                        // 给管道对象pipeLine 设置编码
                        pipeline.addLast(new StringEncoder());
                        pipeline.addLast(new RpcDecoder(RpcRequest.class, new JSONSerializer()));
                        // 把我们自顶一个ChannelHander添加到通道中
                        pipeline.addLast(new UserServiceHandler());
                    }
                });

        // 4.绑定端口
        serverBootstrap.bind(ip, port).sync();
    }
}
